<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<style lang="css">
    .container{
        border: 2px solid yellowgreen;
    }
    .content{
        width: 100px;
        height: 100px;
        background: #47cabf;
        margin: 100px;
        float: left;
    }
</style>
<body>
<div class="container">
    <div class="content"></div>
</div>
</body>
</html>
